set -e:几乎所有的 Bash 版本都支持。 trap 'exit ERR' ERR:同样广泛支持,但可能在某些非常旧的 shell 中不可用。 综上所述,set -e提供了一种快速简单的错误退出机制,适合那些希望在命令失败时立即停止脚本的场景。而trap 'exit ERR' ERR提供了更高级的错误处理能力,允许在脚本退出前进行额外的处理。 需要注...
如果你想要在标准输出同时输出自定义的错误提示,可以使用复合命令(command grouping): cd /net || { echo "Can't read /net. Make sure you've logged in to the Samba network, and try again."; exit 1; } do_stuff more_stuff 注意,在{号和 echo 之间需要有一个空格,同时}之前要加上分号。 顺便...
问: 如何验证程序是否存在,以一种要么返回错误并退出,要么继续执行脚本的方式? 这看起来应该很容易,但它一直困扰着我。...command -v &> /dev/null then echo " could not be found" exit fi 对于 Bash...许多操作系统的 which...
See what it looks like if we do something that intentionally won't work. If youlson a folder that doesn't exist, it will return an error. $lsnoexistls: noexist: No suchfileor directory Let's see what the exit status was. $echo$?1 If we don't set an exit status explicitly, it...
输出全部变量信息 | set | 3.2 创建键盘输入变量 | read | 3.4 设置变量类型 | declare/typeset | 3.4 创建命令别名 | alias | 4.1 取消命令别名 | unalias | 4.1 查看和管理历史命令 | history | 4.2 重新读取配置文件 | source | 5.4 查看和设置终端配置 | stty | 5.6 ...
The script stops the execution after executing the first invalid command using the “set –e” command.#!/bin/bash #Set the option to terminate the script on the first error set -e echo 'Current date and time: ' #Valid command date echo 'Current working Directory: ' #Invalid command ...
Most other editors, throughGCC error compatibility. In your build or test suites While ShellCheck is mostly intended for interactive use, it can easily be added to builds or test suites. It makes canonical use of exit codes, so you can just add ashellcheckcommand as part of the process. ...
cd/foo ||exit1 bar baz bat ...# Lots of commands. 出错时,cd 命令会报告无法改变当前目录,同时将错误消息输出到标准错误,例如 "bash: cd: /foo: No such file or directory"。如果你想要在标准输出同时输出自定义的错误提示,可以使用复合命令(command grouping[17]): ...
最简单地方法是禁用 histexpand 选项,你可以通过 set +H 或者 set +o histexpand 命令来完成。 下面四种写法都可以解决: 复制 # 1. 使用单引号echo'Hello World!'# 2. 禁用 histexpand 选项set+Hecho"Hello World!"# 3. 重置 histcharshistchars=# 4. 控制 shell 展开的顺序,命令行历史展开是在单词拆分...
set_error_handler(function ($errno, $errstr, $errfile, $errline) { throw new ErrorExceptio...